| 制造商 | 部件名 | 数据表 | 功能描述 |
 National Semiconductor ... | DPC2020R |  501Kb/10P | Thin-Film or MIG Head Read/Write Preamplifier February 1994 |
| DPC2020RM-2 |  501Kb/10P | Thin-Film or MIG Head Read/Write Preamplifier February 1994 |
| DPC2020RM-4 |  501Kb/10P | Thin-Film or MIG Head Read/Write Preamplifier February 1994 |
| DPC2020RMS-4 |  501Kb/10P | Thin-Film or MIG Head Read/Write Preamplifier February 1994 |
 National Semiconductor ... | DPC2020RM-2 |  501Kb/ 10P | Thin-Film or MIG Head Read/Write Preamplifier February 1994 |
| DPC2020RM-4 |  501Kb/ 10P | Thin-Film or MIG Head Read/Write Preamplifier February 1994 |
| DPC2020RMS-4 |  501Kb/ 10P | Thin-Film or MIG Head Read/Write Preamplifier February 1994 |
| DPC2021RM-4 |  501Kb/ 10P | Thin-Film or MIG Head Read/Write Preamplifier February 1994 |